$\left(43y+7\right)\left(3y-7\right)$
$-8945+771$
$9x^2y+6xy-7x^2y-9xy$
$\int-8dx$
$\int\frac{\left(lnx\right)^8+1}{x}dx$
$\frac{dx}{dt}=tx+\left(1-t\right)x=e^{2t}$
$\frac{32}{2^{-2}}$
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